Background: Clinical supervision plays an essential role in the development of mental health professionals and is increasingly viewed as a discrete professional specialization. However, research has rarely addressed core issues such as the measurement and manipulation of clinical supervision, so there are very few direct comparisons between the different supervision methods. Aims: To operationalize two related approaches, cognitive-behavioural (CBT) and evidence-based clinical supervision (EBCS), demonstrate their fidelity, and then evaluate their relative effectiveness in facilitating the experiential learning of one supervisee. Method: Within a multiple-baseline, N = 1 design, we rated audiotapes of supervision on a competence rating scale. Results: Findings generally favoured the EBCS approach, which was associated with higher fidelity by the supervisor and increased engagement in experiential learning by the supervisee. Conclusions: This preliminary but novel evaluation indicated that CBT supervision could be enhanced. Implications follow for supervisor training and a more rigorous N = 1 evaluation.

Despite the acknowledged importance of clinical supervision, controlled research is minimal and has rarely addressed the measurement or manipulation of clinical supervision, hampering our understanding and application of the different supervision methods. We therefore compared two related approaches to supervision, cognitive-behavioural (CBT) and evidence-based clinical supervision (EBCS), evaluating their relative effectiveness in facilitating the experiential learning of one supervisee. Drawing on a multiple-baseline N = 1 design, we gathered mostly qualitative data by means of an episode analysis, a content analysis, a satisfaction questionnaire, and interviews with the supervisor and supervisee. We found that the EBCS approach was associated with higher supervision fidelity and increased engagement in experiential learning by the supervisee. This case study in the evaluation of supervision illustrates the successful application of some rarely applied qualitative methods and some potential supervision enhancements, which could contribute to the development of CBT supervision.

Cognitive-behavioural therapy (CBT) supervision has traditionally been presented as an extension of the therapy, a reflexive strategy that includes a commendable commitment to a principled approach. However, a critical review suggests that this strategy has not been implemented with fidelity. Furthermore, this strategy overlooks potentially valuable ideas from the wider field of clinical supervision, runs counter to CBT's empirical roots, and under-values supervision as a discrete professional specialization. For these reasons, it is argued that new developments should be grafted onto the current approach. In future, this augmented version of CBT supervision should be subjected to the same kinds of research and development (R&D) activity as CBT. Initially, this could include developing a manual to specify and operationalize this innovative approach, evaluation of manual-based training, and N = 1 research to assess its effectiveness. Examples of preliminary work are provided, and future R&D directions identified.